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4. Frequency Comb Based on SCG

Author

Yue, Yang, Fang, Yuxi, Geng, Wenpu, Bao, Changjing, Shum, Perry Ping, Series Editor, Yue, Yang, Fang, Yuxi, Geng, Wenpu, and Bao, Changjing

Published
2024
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7. Fundamental Equations

Author

Yue, Yang, Fang, Yuxi, Geng, Wenpu, Bao, Changjing, Shum, Perry Ping, Series Editor, Yue, Yang, Fang, Yuxi, Geng, Wenpu, and Bao, Changjing

Published
2024
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9. Introduction

Author

Yue, Yang, Fang, Yuxi, Geng, Wenpu, Bao, Changjing, Shum, Perry Ping, Series Editor, Yue, Yang, Fang, Yuxi, Geng, Wenpu, and Bao, Changjing

Published
2024
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12. Applications of SCG

Author

Yue, Yang, Fang, Yuxi, Geng, Wenpu, Bao, Changjing, Shum, Perry Ping, Series Editor, Yue, Yang, Fang, Yuxi, Geng, Wenpu, and Bao, Changjing

Published
2024
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14. Nonlinear photonics on integrated platforms

Author

Geng Wenpu, Fang Yuxi, Wang Yingning, Bao Changjing, Liu Weiwei, Pan Zhongqi, and Yue Yang

Subjects
nonlinear photonics, integrated photonics, frequency combs, supercontinuum generation, Physics, QC1-999
Abstract

Nonlinear photonics has unveiled new avenues for applications in metrology, spectroscopy, and optical communications. Recently, there has been a surge of interest in integrated platforms, attributed to their fundamental benefits, including compatibility with complementary metal-oxide semiconductor (CMOS) processes, reduced power consumption, compactness, and cost-effectiveness. This paper provides a comprehensive review of the key nonlinear effects and material properties utilized in integrated platforms. It discusses the applications and significant achievements in supercontinuum generation, a key nonlinear phenomenon. Additionally, the evolution of chip-based optical frequency combs is reviewed, highlighting recent pivotal works across four main categories. The paper also examines the recent advances in on-chip switching, computing, signal processing, microwave generation, and quantum applications. Finally, it provides perspectives on the development and challenges of nonlinear photonics in integrated platforms, offering insights into future directions for this rapidly evolving field.

Published
2024
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20. Extremely Dispersive Fiber With Gradient-High-Index Core and Concentric Ring

Author

Peng, Qinru, Geng, Wenpu, Zhao, Wenqian, Liu, Yuanpeng, Pan, Zhongqi, and Yue, Yang

Abstract

In this work, an extremely dispersive optical fiber, incorporating a gradient-index central core and extra concentric ring structure of high-index material, is proposed and tailored specifically for the HE1,1 mode. The impacts of geometrical parameters and doping concentration are explored for the corresponding dispersion characteristics. By systematically adjusting diverse fiber parameters, it becomes evident that alterations in the curve slope discrepancies between the effective index of the central core and the outer ring directly influence both the optical dispersion peak and bandwidth. Consequently, the optical dispersion characteristics of the designed fiber can be customized to meet specific requirements by adjusting both fiber geometry and doping concentration of germanium dioxide. Further refinement of the fiber’s geometric parameters results in achieving a negative chromatic dispersion value of -203,898 ps/(nm $\cdot $ km) at 1547.9 nm. Moreover, the peak dispersion magnitude in our gradient-index fiber design significantly surpasses that of the step-index fiber.

Published
2025
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45. Recent Progress of Supercontinuum Generation in Nanophotonic Waveguides.

Author

Fang, Yuxi, Bao, Changjing, Li, Si‐Ao, Wang, Zhi, Geng, Wenpu, Wang, Yingning, Han, Xu, Jiang, Jicong, Zhang, Weigang, Pan, Zhongqi, Li, Zhaohui, and Yue, Yang

Subjects
SUPERCONTINUUM generation, COMPLEMENTARY metal oxide semiconductors, SILICON alloys, WAVEGUIDES, OPTICAL waveguides, SILICON nitride, LITHIUM niobate
Abstract

Supercontinuum (SC) has opened up possibilities for numerous applications in optical communications, signal processing, metrology, and spectroscopy. Supercontinuum generation (SCG) in the integrated nonlinear platforms has attracted much interest recently, due to its fundamental advantages in terms of complementary metal oxide semiconductor compatibility, low power consumption, compact size, and cost‐effectiveness. In this paper, the latest progress on various types of nanophotonic waveguides for SCG is reviewed. The material properties of silicon, germanium, silicon–germanium alloy, silicon nitride, silica, chalcogenide, III–V materials, lithium niobate, and other materials, which are used as nonlinear media for SCG are discussed. The wavelength‐dependent nonlinear Kerr index, material, and nonlinear loss of the waveguides are taken into account. This review mainly focuses on the SCG resulting from the cubic χ(3) nonlinearity processes pumped by the femtosecond pulse. The recent representative SCG works based on the integrated optical waveguides are summarized, and further classified according to the dispersion characteristics. Furthermore, different types of spectra broadening mechanisms in details according to the classifications are analyzed. Perspectives on the SC spectral coverage, the realization of various dispersion curves, and the novel materials, which are the key aspects of the SCG in nanophotonic waveguides are provided. [ABSTRACT FROM AUTHOR]

Published
2023
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50. Dispersion Compensating Ring Fibre in the C-Band for OAM Mode

Author

Zhao, Wenqian, primary, Han, Xu, additional, Geng, Wenpu, additional, Wang, Yingning, additional, Fang, Yuxi, additional, Bao, Changjing, additional, Wang, Zhi, additional, Liu, Yan-Ge, additional, Ren, Yongxiong, additional, Pan, Zhongqi, additional, and Yue, Yang, additional

Published
2021
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